Pl. solaria. [L. sōlārium, f. sōl sun. Cf. SOLLAR sb.1]

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  1.  A sun-dial.

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1842.  Smith’s Dict. Gr. & Rom. Antiq., 487/2. This solarium being made for a different meridian. Ibid. The number of solaria which have been discovered … in Italy.

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1880.  L. Wallace, Ben-Hur, 142. Lifting his eyes from the solarium set under the aplustre for reference in keeping the course.

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  2.  A terrace, balcony or room exposed to the rays of the sun, now spec. one used for the purpose of treating illness by means of sun-baths. Also fig.

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1891.  E. Eggleston, Faith Doctor, xxvi. 289. My brother kept a health-lift a few years ago…. But people got tired of condensed exercise, and then he had a blue-glass solarium.

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1894.  The Voice (N.Y.), 20 Sept. The solariums on the roofs of the houses of the ancient Greeks and Romans testify to the benefits obtained by them from sun baths.

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1904.  J. Wells, Life J. H. Wilson, xvi. 139. The Church was a sort of spiritual solarium, where men and women of desires could bathe themselves with the hope of destroying evil germs and the wasting fevers of the soul.

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